Actually it's gonna be more. If you have the first PS2, you're gonna have to buy the network adaptor for maybe $30-$50, a broadband internet connection for like $30-$40, a router for about $30-$40, and an ethernet cord to connect the router to the PS2 for maybe $5-15$ (depends on the size of cord you get)
So it'll be about $120. But if you have the new PS2, it'll be about $80 maybe, cause you dont have to buy the network adaptor, since it's already built in